We're still discussing how this will be handled with development. Currently, the only way to get a refresh token is to have the customer reauthorize your OAuth client. We will update you if a new method is introduced to allow developers to get a refresh token from an existing access token.

Is there any update to refresh the access token once it expires. Still unable to get the new access token. To do it I have to re-authorize the customer for temporary token afterward using it I have to generate the access token.